论文标题
OGLE-2019-BLG-0362LB：围绕低质量恒星的超霍维亚质量行星
OGLE-2019-BLG-0362Lb: A super-Jovian-mass planet around a low-mass star
论文作者
论文摘要
我们介绍了行星微透镜事件的分析OGE-2019-BLG-0362，其短次异常$（\ sim 0.4 \，\ rm天）$附近是由光曲线峰附近的，这是由谐振速率引起的。该事件具有严重的变性，$Δχ^2 = 0.9 $之间的近距离和宽二元镜头模型都具有行星宿主质量比$ q \ simeq 0.007 $。我们测量了角度爱因斯坦半径，但不能测量Microlens视差，因此我们进行贝叶斯分析以估计镜头的物理参数。我们发现OGLE-2019-BLG-0362L系统是一个超级jovian-Mass Planet $ M _ {\ rm P} = 3.26^{+0.83} _ { - 0.58} \，M _ {\ rm J} h} = 0.42^{+0.34} _ { - 0.23} \，m_ \ odot $在距离$ d _ {\ rm l} = 5.83^{+1.04} _ { - 1.55} \，\ rm kpc $。投影的星形分离为$ a _ {\ perp} = 2.18^{+0.58} _ { - 0.72} \，\ rm au $，这表明行星位于主机恒星的雪线之外。
We present the analysis of a planetary microlensing event OGLE-2019-BLG-0362 with a short-duration anomaly $(\sim 0.4\, \rm days)$ near the peak of the light curve, which is caused by the resonant caustic. The event has a severe degeneracy with $Δχ^2 = 0.9$ between the close and the wide binary lens models both with planet-host mass ratio $q \simeq 0.007$. We measure the angular Einstein radius but not the microlens parallax, and thus we perform a Bayesian analysis to estimate the physical parameters of the lens. We find that the OGLE-2019-BLG-0362L system is a super-Jovian-mass planet $M_{\rm p}=3.26^{+0.83}_{-0.58}\, M_{\rm J}$ orbiting an M dwarf $M_{\rm h}=0.42^{+0.34}_{-0.23}\, M_\odot$ at a distance $D_{\rm L} =5.83^{+1.04}_{-1.55}\, \rm kpc$. The projected star-planet separation is $a_{\perp} = 2.18^{+0.58}_{-0.72}\, \rm AU$, which indicates that the planet lies beyond the snow line of the host star.
